Perhaps you should try some spelling variations:
hieu vien » hieu hien, hieu viec, thieu nien
cau triet » cau trieu, su triet, cua triet
thu sach » tu sach, thuat sach, thuoc sach
hoc sach » hoc sinh, hoc cac, hoc anh
vien cac » vien bach, vien dai, vien da
cac tuc » cac toc, cac tu, cac tac
danh vi » hanh vi, danh di, danh va
dinh vi » dinh ve, dinh viet, dinh tri
tuc va » thuc va, truc va, tuc xa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sach) or (hoc sach)) ky nang x ho. hieu vien cac tuc va ((danh vi) OR (dinh vi)) cau triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sach) OR (hoc sach)) ky nang x ho. hieu vien cac tuc va ((danh vi) OR (dinh vi)) cau triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sach) or (hoc sach)) ky nang x ho. hieu vien cac tuc va ((danh vi) OR (dinh vi)) cau triet".
• Adding a wildcard symbol may retrieve word variants: ((thu sach) or (hoc sach)) ky nang x ho. hieu vien cac tuc va ((danh vi) OR (dinh vi)) cau triet*.